Show 1 l I I 1 Alaska Mines Yield 28 hi in 1918 During 1918 1915 the figs mines of or Alaska according to preliminary pre pro estimates prepared by G. G C. C Martin of ot the United States geological sur e survey department of ot the interior Although Al Al- though h Alaska mining was so o adversely adverse adverse- ly h affected by shortage e of ot labor and shipping and by high cost o of supplies that the tho value of the output fell nearly nearl from 1917 1911 the tho pro production was still far greater than In any year fear before 1915 1016 Alaska's chief mineral product la is copper of ot which pounds valued at was WuI mined In 1915 1918 The Tho gold output worth of ot which placers yielded 1 was less than In 1917 j and was the smallest since 1 1904 04 Tho mining of or tons of ot coal worth is significant as the only marked advance ad over tho the production production production tion of 1917 as s by b far tar the tho largest coal output In Al Alaska a mining and as the probable beginning of or a substantial coal industry Alaska also produced in n 1915 silver worth tin Un worth orth lead worth chromo chrome ore tungsten tuns-ston palladium and antimony n aggregating and petroleum marble gypsum limo and bricks aggregating The total yield of ot Alaska mines since 1550 has been moro more than Of or till gold was worth and copper |